Typewriting-machine-carriage construction



Dec. 8 I J. ALEXANDER TYPEWRITING MACHINE CARRIAGE CONSTRUCTION Filed Dec. 1923 2 Sheets-Sheet 1 76 v 1 Q J INVENTOR BY T1 L1 1 ATTORNEY Dec. 3, 1925- 1,564,744

J. ALEXANDER TYPEWRITING MACHINE CARRIAGE CONSTRUCTION Filed Dec. 1923 2 Sheets-Sheet 2 INVENTOR a Jess: flLEX/l/VDER ATTORNEY Patented nee. a, 1 925.-

UNITED STATES JESSE ALEXANDER, OF LOS ANGELES, CALIFOBNIAi- TYPEWRITING-MACHINECARRIAGE CONSTRUCTION.

Application filed December 26, 1923. Serial in. 682,677.

To all 'ulllom, it 'wm mum/n I Be it known that I. Jnssu ALEX \l\:D]-lR, a citizen of the United States, residlng at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Typewriting-Machine-Carriage Constructions, of which the following is a specificatlon.

The general objects of my invent on are to improve the carriage construction of typewriting machines.

Special objects are to properly guide and support the paper where it passes around the forward side of the platen, to facilitate adjustment of the paper guidesjfor different widths of paper and to prov1de a simple and easily set marginal stop.

A further special object is to, provide a simple form of stop which can be rendered operative when desired for paragraphing purposes.- v

Another object is to enable the ready separation of the carriage from the supporting frame, and the platen from the carriage frame, and to prevent loss or displacement of the screws which normally serve to hold these parts in their assembled relation.

In the accomplishment of the foregoing and other objects, I provide paper gulding fingers which are slidably engaged on a rod mounted above the platen, and extend said paper guiding fingers down around the forward portion of the platen into engagement with notches provided in a rod located at the forward side of 'the platen. These guide fingers are of special construction to permit the feeding out of the advance end of the paper, and one of said fingers pref erably carries a stop cooperating with a relatively stationary member to form a marginal stop.

Paragraphing and indenting is made simple, uniform, and practically automatic, according to my invention, by provision of a stop located at the proper point for paragraphing purposes and adapted when desired, to be shifted into a plane for engagement by the marginal stop on the carriage.

The other features and the details of construction will appear as the specification proceeds, and will be made clear by consideration of the accompanying drawings, which illustrate the invention embodied in a practical and preferred form.

In the drawings Fig. 1 is a ing frame 0 features of my invention.

Fig. 2 is a similar view showing the base plate which carries the carriage guiding rod, separatedfrom themain supporting frame. 7

Fig. 3 is a vertical sectional view through the intermediate ortion of the machine.

Fig. 4 is a bro en front. elevation of the platen and platen frame.

plan view of the main support- Fig. 5 is a broken front view of the car- I riage frame. f

The main frame 7 is suitably "constructed to properly maintain and support the several parts of the machine.

The platen 10 is journaled in a frame made up ofthe side plates 11 and 12, and the front and back bars 13 and 14. This platen frame is in turn mounted in the carria e made up of the side plates 8 and 9, and the front and back bars 15 and 16. The paper carriage thus constructed is transversely movable on the main supporting frame, as by being engaged on the transversely extending guide rods 17 and 18, the carriage being shown as carrying a roller a typewriter embodying the 19 riding on the frontguide rod 17 and connected to a sleeve 20 slidable on the rear guide rod 18.

The paper is guided and supported in respect to the platen by a rear paper guide 22 supported in the platen frame and extending downward around the rear side of the platen, and by paper guide fin ers 23 and 24 slidable on a rod 25 supporte above and slightly to the rear of the platen center,

said paper guide fingers extending for-' wardly and downwardly around the front portion of the platen.

The paper ide fingers are adjusted to different widts of paper by sliding them.

center of the platen so as to permit the paper guide fingerslbeing readily adjusted toward each other, and to oppose the moverock shaft in the position with the guide fingers engaged with the notches in the abutment rod, and by causing this spring to bear against the flat side of said supportingrock shaft, it will be evident that said shaft may be tilted backward as indicated in the dotted lines of Fig. 3, to throw the paper fingers out of the way, in which position the parts will be automatically held by said spring.

Pressure rollers are preferably carried by the paper guide fingers to hold the paper in firm engagement with the surface of the platen, and at points above these pressure rollers, the paper guide fingers are preferably cut in or offset as indicated at 36, to provide for the issuance of the advance end of the paper sheet 37.

Pressure rollers 88 are preferably also provided at the rear side of the platen, and the tension of these rollers is preferably made adjustable, in the present instance by mounting them 011 the ends of spring arms 39 carried by a shaft 40 having at its ends upstanding lugs 41 in which are engaged the adjustlng screws 42 which have a bearing against shoulders 4-3 on the inside of the side plates of the platen frame. It will be apparent that by adjusting these screws, the pressure rollers may be forced with greater or less pressure toward the platen, and "that the pressure at the opposite ends of the platen may be made the same or different as conditions may require.

Marginal stops are provided, and these stops consist in the present disclosure, of a rearwardly extending relatively stationary abutment 45 carried by the transverse type bar segment 46, and arranged to be engaged by an outstanding stop lug 47 at the lower end of the left hand paper guide finger. It

will be evident therefore that the adjustment of these paper guide fingers also serves to determine the point with which the marginal stops will cooperate to determine the marginal printing point.

To facilitate paragraphing and indenting, I have provided a device which I have termed a paragraphing stop, and which can be-rendered operative to stop the carriage on its return movement at a proper closure this paragraph stop takes the form of a flat spring 50, secured at 51 on the back of the type bar segment and provided at one end with a stop 52 normally supported by said spring out of the plane of engagement by the stop on the carriage, but adapted to be shifted into the path of travel of the carriage stop, by suitable manually controlled means such as the push button 53. This push button as indicated'in Fig. 1, projects out through the front of the machine within convenient reach of the operators hand,

turning the carriage with the other hand.

The result of this is to place the para graphing stop in the path of the carriage stop and cause said carriage to be stopped at the proper point for paragraphing. This paragraphing stop" may if desired, be made adjustable for paragraphing at different distances inward from the margin.

The carriage is made readily detachable from the main supporting frame, in the present instance by making the base plate 55 which carries the rear carriage guiding rod 18 readily, detachable from the main supporting frame. This is accomplished in the illustration by providing securing screws 56, passed upward through screw receiving openings 57 in the plate 58 of the main supporting frame, into engagement with alining screw seats 59 in the base plate 55.

Disengagement and loss of these screws is prevented by forming them with annular grooves 60 below the screw threads on the end thereof, in which engage split spring collars 61 which fit in a counter-bored portion 62 of the screw receiving openings 57, and so prevent withdrawal of the screws.

In some instances it is desirable to remove the paper carriage without taking off the carrage guiding rod, and to allow for this I have shown the carriage frame as being detachably engaged with the guide sleex e 20 which slides on the rear carriage guiding rod 18. The detachable securing means employed for this purpose is similar in a general way to that employed for fastening the carriage guide rod frame to the main supporting frame, and embodies a securing thumb screw 65 passed through a screw re ceiving opening 66 inthe rear carriage bar 16 into engagement in a screw seat 67 on the sleeve 20. The screw is annularly grooved at 68 to receive the split spring collar 69 which is received in the counter-bored portion 70 of the screw receiving opening 66.- As it is desirable to employ only a single securing screw at this pomt, some means, such as the dowel-pins 71 are pref? erably provided to prevent a rocking movement of the carriage in respect to the sleeve.

suitable key and type bar actlon is provided, preferably lik'ethat' disclosed in my copending application Serial No. 6 82,678 tiled Dec. 26, 1923, and comprising pivoted type bars 75 operated from the key levers 76 through the medium of intermediate levers T7 and the push links 78.

Suitable ribbon feeding and eseapement mechanism is also provided, the ribbon being here shown as carried by spools 80 and 81, and guided at the central printing point by an arm 82 from the escapement rocker 8384.

The escapement rocker carries dogs 85 engaging with a 'ack 86 on the carriage, and this rocker is operated through a link 87 on the unversal bar 88.

From the foregoing it will be apparent that my invention possesses numerous advantages, and that it is simple, practical, and at the same time inexpensive in construction.

\Vhat I claim is 1, In a typewriter, a su porting frame, a transversely movable carriage mounted on said frame, a marginal stop on said carriage, atransversely extending support carried by the frame, a marginal stop on the back of said support arranged to be engaged by the marginal stop on the carriage, a flat spring secured at one end on the back of said transverse support, a projecting stop on the yielding portion of said fiat spring and normally supported by said spring out of the plane of travel of the marginal stop on the carriage, and a push button en aging the yielding portion of the flat sprlng to push the same rearwardly and carry the stop thereon into the plane of travel of the marginal stop on the carriage.

2. In a typewriter, a platen frame, a platen mounted in said frame, a paper guide 'arried by said frame and extending around the rearward portion of said platen, a notched abutment rod mounted in the frame at the forward side of the platen, a rod pivoted in the platen frame above the platen, and .paper guide fingers slidably engaged on said pivoted rod and extending down around the forward side of the platen into engagement with notches in the notched abutment rod.

3. In a typewriter, a platen frame, a platen mounted 'in said frame, a paper guide carried by said frame and extending downwardly around the rearward portion of said platen, a notched abutement rod mounted in the frame at the forward side of the platen, a spring pressed angularrod pivoted in the frame above the platen, and paper guide fingers slidably engaged on said angular rod and extending downward around the front side of the-platen into engagement with notches in the notched abutment rod.

'4. In a typewriter, a supporting frame, a transversely movable platen frame mounted on said supporting frame, a platen jonrnaled in the platen frame, a paper guide carried by said platen frame and extending downward around the rearward side of the platen, a notched abutment rod on the platen frame at the forward side of the platen, a rod mounted in the platen frame above the ,platen, paper guide) fingers slidably engaged on said rod and extending-downward around the front side of the platen into engagement with notches in the notched abutment rod, a marginal stop carried by one of said paper guide fingers, and a cooperating marginal stop on the supporting frame arranged to be engaged by said paper guide finger marginal stop.

In a typewriter, a supporting frame, a carriage guiding frame on said supporting frame, one of said frames having screw seats therein and the other of said frames having alined screw receiving openings, said screw receiving openings being counterbored at the meeting faces of the two frames to larger diameter than the screw seats, screws engaged in the screw receiving openings having threaded ends engaging in the screw seats, and spring collars engaged on said screws below the screw threads thereon and received within the counter.- bored portions of the screw receiving openings v v I (i. In a typewriter, a supporting frame, a carriage guiding frame on said supporting frame, one of said frames having screw seats therein and the other of said frames having alined screw receiving openings, said screw receiving openings being counterbored at the meeting faces of the two frames to larger diameter than the screw seats, screws engaged in the screw receiving openings having threaded ends engaging in the screw seats and annular grooves below said threaded portions, and split spring collars engaged in the annular grooves in the screws and received in the counter-bored portions of the screw receiving openings.

7. In a typewriter, a supporting frame, a carriage guiding rod mounted on said frame, a sleeve slidably engaged on said rod having a screw seat therein, a carriage frame having a screw receiving opening in line with the screw seat in the sleeve and said screw receiving opening being enlarged on the side adjacent the carriage frame, a screw passed through the screw receiving opening and having a threaded portion engaged in the screw seat in the sleeve and a spring collar engaged on said screw and received within the enlargement in the screw receiving opening.

8. In a typewriter, a platen frame a platen mounted therein, a s iaft journaled 1n the platen frame parallel to. the platen,

spring arms carried by said shaft, pressure rollers carried by said spring arms and held thereby in yielding engagement with the platen, an arm on said shaft, a screw engaged in said arm, and a shoulder on said gluten frame engaged by said screw where the pressure of said rollers against the p aten may be regulated by said screw.

9. In a typewriter, a platen frame, a

platen mounted therein, a. shaft journaled -in the platen frame parallel to the platen, spring arms carried by said shaft, pressure rollers carried by said spring arms and held thereby in yielding engagement with the platen, arms on the opposite ends of said shaft, screws enga ed in said arms, and shoulders on said p aten frame'engaged by said screws whereby the tension of the ressure rollers at 0 apositeends of the p aten may beregulate by said screws.

In testimony whereof I have aflixed my signature to this specification.

JESSE ALEXANDER... 

